Trust me....I know that feeling. Do you have friends that can come and hang out with you? Close by family? You must force yourself to get out and take your mind off things. You must. Do not allow the darkness to close in on you.
You need to focus on you right now. You cannot control what she does...Period. DO not answer calls, texts, emails, etc. Do not allow her to come over. You need to put as much space between you as possible. As long as she does not acknowledge that she has a problem, she poses a major danger to you.
Please work on YOU Par, you are the only one that can change you. Don't do it for anyone else....just you. You are worth taking care of, and worth being the best you!